Improved paper flour-sack



UNITED STATES PATENT OEEIGE.

JOHN M. HURD, or AUBURN, NEw YORK.

IM PROVED PAPER FLOURSACK.

Specification forming part of Letters Patent No. 70,852, dated November 12, 1867 To whom it may concern:

Be it known that I, JOHN M. HURD, of the city of Auburn, in Cayuga county, New York, have invented a new and Improved Mode of Closing up the Paper Flour-Sack, after the same has been iilled, more completely and rmly than is commonly done 5 and I do hereby declare the following to be* a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, and to the letters of reference marked thereon.

The paper Hour-sack requires to be manufactured from very highly sized stock, in order that it shall safely hold the flour without loss or waste. After the flour is deposited within the sack, it then becomes necessary to fold together the upper end of the sack or bag in the same manner as the grain-bag, and then to secure it in that position by the use of a string wound around the folds and firmly tied, in order to prevent the flour from escaping iherefrom. Now, as this paper is very hard and smooth, in order to facilitate the work of tying up or closing the mouth of the sack, I have constructed a machine with two sets of iiuted rolls, and I pass the sack through between these, some distance from the top of the sack-say, two or three inches. This crimps or softens a strip or band around the sack, the width of which equals the length of the flutes on the rolls, but leaves the top unsoftened.

Now, in order that others may know how to make and use my invention, I will proceed to describe its construction and mode of operation. l

Figure l shows, in perspective, the machine which I have essayed and built and used for the purpose above referred to. Fig. 2 is a vertical elevation of the front of the same. Fig. 3 is a section showing the manner of connecting the rolls and communicating motion to the same. Fig. 4 shows a portion of a sack after v the same has been crimped or softened.

In Fig. 1, A A is the frame-work support* ing the shafts B B B, &c., on which are placed the two sets of tluted rolls C D, E F, and also one set of plain rolls, G H. These rolls are placed on the ends of the shafts B B, Sto., proA jecting from the frame-work A of the machine, the frame-work forming a gage against which a plain space, I'I. The length of this determines the distance from the top of the sack at which the crimping commences, and the length of the toothed portion of the rolls J determines the width of the crimping.

K is a pulley for giving motion to all the rolls, and is placed upon the shaft B.

Fig. 3 is a vertical section of the machine taken through Fig. 1 at L, showing the geared connection of all the shafts, which is as follows: No. 1 engages No. 2; No. 2, No. 3; No. 3, No. 4; No; 4, No. 5; No. 5, No. 6; No. 6,

No. 7;v No. 7, No. 8; and when the pulley Kis turned in the direction of the dart lVI the sides of both the plain and iiuted rolls in closest proximity will move in a direction to carry the bag N to the right, passing it through the series-first, through the plain rolls G H, for the purpose of preventing the paper from wrinkling or folding, and thence through the rolls C F, and from thence through the rolls D E.

In Fig. 4, O is the top en d of the sack, and F the space crimped or softened, which is from three to four inches wide.

Fig. 5 represents my sack filled. Q shows the cord wound around below the top, and R the portion above the cord, as being much longer at that point than itis at the point where the cord is wound. f

Fig. 6 represents a full sack, crimped at the top, and it will be noticed that the top of the sack S, above the cord T, is quite as small in diameter as at the point where the vcord is placed.

I am aware that a patent has been taken by certain parties for softening the top of paper Hour-sacks, and I wish to state particularly that that is not of the essence of my invention, as this consists in crimping a band around below the top of the sack, and leaving the top of the sack unsoftened or crimped,`for the pur pose of preventing the string used in holding the mouth of the sack closed from slipping oif over the top, and allowing the mouth of the sack to open and the flour to escape.

It is the custom in flour-stores to pile up the flour-sacks, when lled, one upon another to the height of some three or four feet, with the tied ends exposed to whatever may act again st them by persons passing through the store or past the pile, and it is frequently the oase that when sacks are crimped at the top, when subjected to the use above described, the string or cord with which they are tied slips oi, because the top-crimped sack is smallest at the top.

Now, my invention -consists in crimping or otherwise softening a strip or band around the sack, whose upper edge may commence from two to three inches below the top of the sack, and extend downward sufficiently to allow of folding, say, `three or four inches wide from top to bottoni, leaving the top uncrimped. By this arrangement the mouth of the sack may be easily closed and made very much smaller where the string for holding the same is placed than it is above, for the purpose of preventing the string from sliding oil' over the top.

Having above minutely described the con struction of my machine and the nature of my invention, what I claim as new, and wish to Witnesses HENRY REA, A. BARRETT. 

